Okay, all done. 12/12 has started. I have a 4" fan and ducting and a 5" cooltube, so I bought a reducer and thats in place. Had a feel of the top of the cooltube and it is cool to the touch....:thumbsup:.

Only thing is I bought a digital/electronic ballast off ebay, and I have to say, the 400w light really doesn't look that bright. Hope it's not a dodgy one. Anyone had issues with underpowered electronic ballasts?